Procedure:
Simply slice ginger. Add all ingredients to a pot, bring to a boil and let simmer for about 5 minutes. Strain and let cool. For a sweeter syrup add more stevia. For a more dilute ginger flavor, add more water.

Store in fridge for up to 5 days or freeze for later use. Better yet, freeze as ice cubes and add ginger-cubes to spice up a beverage!